(CODUX-113) Add coffee easter egg

[numnx]

🧩 Task: Add coffee easter egg

Automated task PR opened by Code UX for T03.

📋 Summary

Sprint: Sprint 179 · Quicksprint ETA · Task: T03

Upgrade the shared sprint and quicksprint ETA planning overlay into a polished seamless boat animation with an accessible coffee-cup easter egg, backed by focused dashboard tests and documentation.

🤖 Model & Provider

Provider	Codex CLI
Model	gpt-5.5

⏱️ Timing

Started	2026-07-07 12:51:11 UTC
Finished	2026-07-07 12:58:57 UTC
Duration	7m 47s

📊 Token Usage

Metric	Value
Input tokens	189,391
Cached input tokens	2,157,696
Output tokens	16,204
Total tokens	2,363,291
Invocations	1
Tool calls	57
Active time	7m 6s

Included usage estimate (subscription/local login): $2.51

✅ QA Review

⏳ QA review runs after this PR is opened. Check the task card in the dashboard for the outcome once it lands.

📝 Full Task Prompt

## Objective
Add an accessible easter egg to the shared ETA overlay: clicking or keyboard-activating the moving boat changes it into a beautifully designed steaming coffee cup with a friendly reminder to get coffee.

## Scope
- Edit `dashboard/src/v2/components/ui/PlanningProgressOverlay.tsx`
- Edit `dashboard/src/v2/components/ui/PlanningShip.tsx` or add a small local SVG component in the same ownership area if cleaner
- Edit `tests/dashboard/v2/ui-components.test.tsx`
- Edit `tests/dashboard/v2/sprint-composer.test.tsx` if an end-to-end composer interaction assertion is needed

## Implementation Requirements
1. Make only the vessel visual interactive, using a real `button` or equivalent keyboard-accessible control with an explicit `aria-label`; support pointer click plus Enter/Space activation.
2. On activation, swap the vessel to a polished steaming coffee cup visual and surface friendly reminder copy such as a short coffee-break prompt without removing ETA, Elapsed, minimize, secondary action, or cancel controls.
3. Prevent vessel activation from bubbling into overlay background dismissal and keep Minimize, New Sprint/New Quicksprint, and Cancel Active Request behavior unchanged.
4. Reset the easter egg state when a new busy planning/quicksprint request starts or when the action type changes, so the coffee state does not leak between separate requests.
5. Respect reduced-motion preferences by rendering static steam or non-animated steam when reduced motion is active.

## Constraints
- Do not change backend ETA calculation or request lifecycle behavior.
- Do not introduce external image or icon dependencies.
- Keep the visual consistent with existing signal/ember accents and light/dark modes.
- Do not make the whole overlay clickable for the easter egg; the background click must still dismiss only when the background itself is clicked.

## Verification
- Run `pnpm exec vitest run tests/dashboard/v2/ui-components.test.tsx tests/dashboard/v2/sprint-composer.test.tsx`.
- Run `pnpm run typecheck:dashboard`.
- Success means tests can activate the vessel, see the coffee reminder/cup state, and verify cancel/dismiss controls still work.

🌿 Branch Info

Base: feature/CODUX-179-quicksprint-eta
Head: task/feature-codux-179-quicksprint-eta-t03-codex-mranduom

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🤖 Generated by Code UX